How could I use spherical coordinates in COMSOL 5.0 ?

I am simulating flow around a bubble and I need to implement a weak contribution at the bubble surface, the best way to use this weak contribution is to define it using spherical coordinates....

01 February 2017 2,458 3 View

How to define a temperature dependent variable in COMSOL?

I am working on the simulation of a surface tension gradient by temperature gradient.The relation between the temperature and the surface tension is represented in the variable called "Temperature...

10 November 2016 289 6 View

Error message in COMSOL regarding streamline plot ?

As I was running a simulation on COMSOL using a 200x200 um domain, I found some error message when plotting streamlines on a surface.The Error message is : Failed to insert point. - x-coordinate:...

10 November 2016 1,082 2 View

How to set 3D interface boundary conditions for Marangoni convection in liquids using COMSOL Multiphysics ?

I am working on the Marangoni convection in liquids using COMSOL Multi-physics. In my model, I need to impose a shear force on the liquid interface. I studied the "Marangoni Convection" example...

09 October 2016 9,984 4 View

How can I set the boundary layer thickness of an inlet flow boundary condition in FLUENT ?

I need to know how to set the boundary layer thickness of an inlet flow boundary condition in FLUENT. The simulated flow has an inlet Mach number of 0.7 which could not be treated as an in...

10 November 2015 8,013 6 View

How do I track the vortex core in numerical simulations of 3D flow ?

02 March 2015 2,272 2 View

Resistor definition in Piezoelectric bimorph with ANSYS workbench

Hello, good day! I am trying to simulate similar bimorph piezoelectric harvester with below commands. However, the output power doesn't change with resistor value. Please help to find the reason. ET,10,CIRCU94,0 !SET UP RESISTOR R,1,100000 !RESISTANCE VALUE TYPE,10 !SET ELEMENT TYPE E,1,2 !CREATE RESISTOR BETWEEN NODES 1 AND 2 Thanks in advance Regards,

02 March 2021 0 0 View

Why are the velocities so high in my Boussinesq approximation Fluent simulation?

Hello, I have a mechanism where air rises due to convective flows. In this simulation, nothing is driving the air except this. I understand that the Boussinesq approximation only works for small...

02 March 2021 4,910 3 View

LOAD DISPLACEMENT CURVES Stiffness increasing in ANSYS non linear analysis. HOW CAN I CORRECT IT?

Hi. I am doing non linear FE analysis using a new material beam under flexural 2 point loading using ANSYS. I have defined a bilinear material model. The solution has converged. In results I am...

01 March 2021 9,911 3 View

How to show arrows over the streamlines in CFD-post?

I follow this to make streamlines like the photos attached below: (software- CFD post-processing) First I plot the 2D streamline over a surface "streamline 1". them I plot a vector by the...

01 March 2021 8,668 3 View

Which one is easier and better at modeling slender masonry structures? ANSYS or ABAQUS?

I need to model masonry and reinforced concrete minarets for my MSc thesis. Which one is easier and better at modeling slender masonry structures? ANSYS or ABAQUS? (Or any other program for just...

01 March 2021 736 3 View

What is recommended for solid domain in ANSYS FLUENT?

Should I mesh the solid domain ? or should I use wall thickness? or Shell conduction? for Heat Transfer between two fluids of a Heat Exchanger. what is recommended?

01 March 2021 9,785 3 View

Can Virtual Servers (remote dekstop manager) run heavy ANSYS Fluent CFD simulation ?

I have a virtual machine. My host Pc specs are not that good thats why i went for virtual servers. so basically my host pc has 8gb of ram with nvidia quadro k2200 4Gb DDR5 GPU ,processor intel...

01 March 2021 8,415 1 View

How can i resolve the "final solutuin is not converged" error in Comsol for my heat transfer simulation??

I have been trying to simulate heat transfer problem in Comsol 5.5 for long time but it always throw an error stating: "Failed to find a solution. Maximum number of Newton iterations...

28 February 2021 8,626 3 View

How to increase mesh quality of a cfd model in ansys fluent?

How can one improve mesh skewness, orthogonality, aspect ratio?

28 February 2021 7,730 3 View

How can we simulate an hyperelastic-viscoelastic behavor with Ansys APDL?

I am working on modeling and simulation of biomecanical material behaviour, I have succeded on simulating skin using anisotropic hyperelastic material, on APDL and in our lab's finite element...

28 February 2021 552 3 View